− 218 −
[Setup of header unit]
(5) Turn on Bit 2 of SW09 on the interface P.C. board of the header unit.
(Setting to prevent connected indoor units capacity over trouble. (E16))
12 43 1 342 31 42 21 34
2 431 2341 4321 1234
SW06 SW07 SW09 SW10
SW11 SW12
2341 1234
SW16 SW17
SW13 SW14
(5)
Turn on Bit 2 of SW09.
(6) Turn on the power supply to all the units connected to the system other than the failed follower unit.
Determine what to do with the power supply to the failed follower unit in the following manner.
<In case of fault in compressor, electrical part, I/F P.C. board, or IPDU P.C. board>
Leave the power supply off.
<In case of fault in refrigerating circuit or related part (pressure sensor, temperature sensor, refrigerating cycle
part, or f
an system part)>
Turn on the power supply to protect the compressor (by turning on the case heater).
(When the power supply to the unit is turned on, [E19] (trouble in the number of outdoor header units) will be
displayed on the 7-segment display. However, this will not cause any problems.)
(7) Perform settings needed to gain permission for backup operation from the header unit (trouble clearance).
1) Set SW01/02/03 on the interface P.C. board
to 1/1/1 and confirm that [U1] [E26] (dropping out of an outdoor
unit) is displayed on the 7-segment display.
2) Set
SW01/02/03 on the interface P.C. board to 2/16/1. Upon confirming that [Er] [… … …] is displayed on
the 7-segment display, press SW04 and hold for 5 seconds or more.
3) [Er] [… CL] (trouble clearance completed) will be displayed on the 7-segment display.
4) Set SW01/02/03 back to 1/1/1. (The display should change to [U1] [– – –].)
This is the end of follower outdoor unit backup operation setting. Check the operation.
Push switch
7-segment display
Rotary switches
Interface P.C. board of header unit
(7)
Set SW01/02/03 to 1/1/1
[U1] [E26] will be displayed.
Set SW01/02/03 to [2/16/1].
[Er] [… … …] will be displayed.
Press SW04 and hold for 5 seconds or more
[Er] [… CL] will be displayed.
Set SW01/02/03 back to 1/1/1.
[U1] [– – –] will be displayed.
Interface P.C. board of header unit
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